James gordon and john archibald



@uitrit gisten @anni @frn JAMES GORDON AND JOHN ARCHBALD, OF SAN FRANCISCO', CALIFORNIA. .Z'Letters Patent No. 68,979, dated September 1T, 1867.

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T0 ATJL'WHOM IT MAY CONCERN:

Be it known that we, JAMES GORDON and .Tous Ancnnnnn, of San Francisco, in the State of California, have invented a new and improved Barometric Vacuum-Producing Apparatus; and We do hereby declare that the followingr is a full and exact description thereof, reference beingr had to the accompanying drawing, which constitutes a. portion of this specification.

It is well known to all who are familiar with the subject, that the Vproportion of air held by absorption in water has heretofore prevented the formation of perfect `vacuums by the use of water iu what is known as the Torricellian process. v This we have remedied in our apparatus by so propcrtioning and arranging certain of the parts thereof as enables us to first entirely separate the air from a large bodyof water preliminary to its `being afterwards used vfor producing vacuums in other portions of said apparatus.

In theaccompanying drawings, H is a water-purifying and supply-cistern. This cistern is constructed in such a manner that it can be readily closed air-tight, and maybe supplied with a properly proportioned exhausting-tube, F, whose lower extremity may be either curved and turned upwards or may pass directly into a pool or vessel of water. A numberI of air-exhausting chambers, AA, of the desired sizes and proportions, are connected with the'receiving-cistern H by means of suitable valved supply tubes PP. Each of these chambers A is furnished with an exhausting tube, B, whose lower, extremity may be either curved and turned upwards or may terminate in a pool or vessel of water. The eduction open end of each tube B mus-t have a suitable valve tted to it, 'and this valve must be connected with a handle or lever located in convenient proximity -to the party or parties who may be operating the apparatus. The length of-each tubeB fromthe bottom of its respective chamber'A to the point of its outlet must be such that the weight of a column of water in said tube will exceed the atmospheric Ypressure atlsaid outlet. G G are rods, working through suitably protected apertures'in the'head of the cisternfH, and connecting with the valves that close or opencommunication between the said cistern and the exhaustchambers A A. 4Each chamber A has a valved nozzle, or the equivalent thereof, for facilitating the connection therewith of any chamber or vessel from which the air is to be `exhausted for preserving, manufacturing, or other purpose. i Y Y Our improved lbarometric vacuum-producing apparatus is operated in the following manner:

First. Close the valv'ed outlets of the exhausting-tubes B, B, and F, and open the valved connections between the cistern H and the air-exhausting chambers A A.

Second. Entirely fill the apparatus with `water.

Third. Close perfectly adr-tight all? the openings to the apparatus.

Fourth. Open the valved outletiof the tube F or of one of thetubes B, and allow the water to flow through the same until a. vacuum has been thereby produced in the cistern H of suicient capacity to receive all the air that will rise into the same from the water in the apparatus, as 'soon as the formation of the vacuum in the cistern H has relieved said Water of all atmospheric pressure.

Fifth. Closethe connection between the cistern H and the chambers AA. 4

Sixth. Open vthe valved outlets of the tubes BB, and allow the water to lon` through the, same until vacuums shall be formed in the chambers AA. The air can then be exhaustedfrom any chamber or vessel whiehfmay be connected with the chambers A A, and thus the operation of the apparatus may be repeated and continued.

In constructing our improved barometric vacuum-producing apparatus we wish Vit to be distinctly understood that we do not intend t0 limit ourselves to any particular number of chambers, no1' to any particular shape, proportion, or number of the respective parts of said apparatus,'whlst we produce vacuum therein in substantially themanner herein set forth. I

Having thus fully described theconstruction and operation of our improved barometric vacuum-producing l apparatus, what weclaim therein as our invention, and desire to secure by Letters Patent, is-

The combination of the closed water-purifying and supply-cistern H with one or more air-exhausting chambers AA, which are combined lwith one or more tubes or barometric columns B B, all substantially in the manner herein represented and described.

'The approver-specification ot' our invention signed by us this eighteenth day of January, 1867.

JAMES GORDON, Y Y i, JOHN ARCHIBALD. Witnesses:

Tuo. -Lonssna DAN. B. CuIsHoLM. 

